As defined in IEEE 802.3 & 802.3u standards, 10Base-T & 100BaseTX specify the transmission over category 3 or 5 cables media can transmit signals up to 100 meters. 100Base-FX specifies the transmission in multimode fiber media can transmit signals up to 2 kilometers and transmit even longer distance in single-mode fiber medias.

ET-9103ST comes with one RJ45 connector with Auto Cross Over feature to connect to a 10 or 100Base-TX device such as workstation, hub or switch, etc. via Cat.5 copper cables and one ST connector to connect to a 100Base-FX multi-mode fiber device via 50/125, 62.5/125 or 100/140um multimode fiber cables. ET-9103ST will convert the signals between these two different types of cables.

The ET-9103ST is a slim and compact unit with strong metal case. It features 6 status LEDs for easy diagnostics and trouble shooting